Phototherapy and Photochemotherapy in Dermatology

The beneficial effect of ultraviolet (UV) radiation on the course of some skin diseases is well known for a long time. The progress in technology and development of irradiation units that radiate UV-rays of special wave-length increased the possibility of phototherapy. Photothe­rapy as a method of treatment in dermatology has become widely used because of its relative safety and simplicity in comparison with photochemotherapy which is used only in specia­lized centres. In addition the paper discusses different kinds of treatment with UV-radiation.